New version avast anti virus home has been released get it here. here or here
* AswRdr.sys: fixed a race condition that could eventually lead even to a system crash
* Improvements in the executable file unpackers
* Enhanced tolerancy against damaged archives
* Boot-time scan now supports the "Move to chest" command
* Mail scanner: fixes in IMAP handling (NTLM authentication related)
* The "Date of last scan" entry is now updated by all scanners (not only Simple UI)
* Added support for CAB and LHA sfx archives
* P2P Shield: added support for BitLord, uTorrent and ABC
* Boot-time scan now shows textual error strings (instead of error codes)
* WebShield: fixed parsing of HTTP requests in the case where a header is larger than 64K
* WebShield: fixes in the detection of Transfer-Encoding:chunked
* WebShield: new avast4.ini options: NoDefOptinProcess, NoDefIgnoreProcess, default=0
* WebShield: miniscule fix in the GUI
* Minor fixes in the email scanner (related to Lotus Notes clients)
* GUI: most lists (e.g. areas to test, exceptions, etc.) now support the following keyboard shortcuts: INS = Add, DEL = Delete, F2 = Edit
* Aswrdr.sys: fixed compatibility problem with Windows Vista beta versions
* Fixed a problem with the boot-time scanner under Windows Vista beta
* Fixed crashes of the physical memory scan under WinXP x64
* Mail heuristics: added detection of multiple content-type headers
* Avast now does not report the "file is corrupted" messages when trying to unpack a modified, unknown or damaged version of a Winexec packer
* Sched.exe now supports all params of the boot-time scanner
* Added Greek language version